I spoke with a member of the local fire department who said they use Tool Fuel (not to be confused with Trufuel) premixed 40:1 that has an octane rating of 95. It‘s expensive and can‘t recall cost off hand. Their equipment could be used in the next hour or sit for 6 months without use.
They thought he wasn‘t running it hard enough. If that‘s the case makes me think Mtronic then didn‘t learn to fully fuel the carb and ran it too lean. With the strato air injection that is probably a thin line.
According to the US owner‘s manual that Swabian saw is designed to run on mid-grade unleaded gasoline with a minimum octane rating of 89. Octane values less than that can result in higher operating temperatures resulting in an increased risk of piston seizure.
IIRC, back when I purchased my original Farm Boss the manual stated minimum 89 octane gasoline. For years all that was available here was 91-93 octane ethanol free. But recently 87 has become available E-free. That‘s what I run in lawnmowers and generators but still get 91 for the saws. The 100+...
I know of a guy that purchased a 261 Mtronic and bought their oil to extend the warranty. The piston/cylinder were toast in 9 months. Used the correct oil and ethanol free premium. It passed the pressure/vacuum tests. No clue how it failed. He had to pay the labor costs. Only the piston and...
The last time I was at the Stihler they had 2 versions of the 261 on the shelf. An Mtronic and a standard manually adjusted carburetor one. I think the 550xp is only Autotune and not sure of the 545. I notice more offerings with regular carburetors now if that illustrates anything?
I don‘t know your dealer set up, but around here it is a rare occurrence to actually find someone at a dealer that is aware and knowledgeable enough about current Stihl products. It is frustrating. I am then usually asked ˋwhat do you want that for?‘
If you look at the ad you will notice a sticker below the top handle on the Cover which reads “JustInTime“ which is a machining/metal fab corporation in Sturgeon Bay, WI. FYI
It seems driving any manual takes a little time to understand the personality of the vehicle if you will. I know people who can drive 3 on the tree but are totally confused with 4 on the floor! The older fire trucks I remember were double clutch or no clutch all and some with electric shift 2...
It could be the fluid. I could only find amsoil or redline that is compatible to Castrol‘s Syntorq 75W-85 GL-4 which is no longer made. GL-5 gear oil is too slippery for the synchros from what I understand and contains a lot of sulfur that‘s hard on brass.
Low pay considering the amount of hours you put in. Very stressful at times and all the crud you‘re exposed to. Plus disturbed sleep schedule that I can attest is not healthy. Getting up in the middle of the night to lift assist someone gets old real fast. It seems today most fire departments...
It would be interesting to see vegetable based bar oil for comparison. I‘m all for protecting the environment but $32 a gallon is a steep price to pay.
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